Method of and apparatus for spirally winding wire on tubes



7 1,645,803- Oct, 18,1927. DAVE METHOD OF AND APPARATUS FOR SPIRALLY WINDING WIRE 0N TUBES Filed Feb. 11. 1926 Patented Oct. 18, 1927.

- "UNITED STATES ;P ENT; F 1 E.

LnwIs spam, or LOS ANGELES, cemromrm -unrnon or AND APPARATUS roe SPIBALLY wmnme WIRE on runs 7 Application filed February 11,"19'2s. Serial No. 87,492.

" I My invention relates to a method of and apparatus for spirally winding wlre on tubes, the principalobjects of my invention being to provide a relatively sim le, easily I v practiced, and economical metho I for arranging or winding wire or the like spirally 7 upon elongated cylindrical or tubular mem bers, and further to provide a relatively simple form of apparatus that may be advanl tageously used for practicing my improved method. r In certain types of water heaters, and especially those used'for household water heating purposes, circulation tubes having spirally disposed ducts or water passageways are used and it is the purpose of my invention to provide simple meanswhereby a wire-like member may be spirally disposed on the surface of a tube in order that when said tube carrying said spirally disposed member is encased in a jacket or outer tube,

the spirally disposed duct or passa way between the two tubes will form a re atived ly narrow spirally disposed being heated.

With the view, my invention consists in certain novel features of construction and arrangement of parts that will hereinafter be more fully described and claimed and illustrated in the accompanying drawing, in which 1 Figll is a side 'elevational view, partly in section, of an apparatus embodym invention and which is particularly designed for practicing my improved method.

Fig. 2 is a perspective view of the die through which the wire passes while being spirally arranged on the tube.

Fig. 3 is a vertical section taken lengthwise through the center of the die.

' Fig. 4 is a cross-section taken on the line 4-4 of Fig. 3.

Fig. 5 is an elevational view of the head that is carriedby the end of the spindle and which clamps the wire that is applied to the tube.

Fig. 6 is a cross-sectional view taken approximately on the line 66 of Fig. 5. I

Fig. 7 is a cross-sectional view taken approximately on the line 7--7 of Fig. 5.

Fig. 8 is a horizontal section taken on the line 8-8 of Fig. 5.

chamber through which water may circulate while foregoing and other objects in Fig. 9 is an elevationalview of a rtion of a tube with a wire spirally arranged thereupon in the manner provided for by my invention.

Referring by numerals to the accompany, ing drawing which illustrates a simple and practical apparatus for practicing my improved method, 10 designates a base member that is similar to thebed plate of alathe,

and arranged for rotation in'a'suitable'bearing 11 on said base is a spindle 12 that ma be driven in any suitable manner and whic spindle carries a removable head 13 that is substantially cylindrical in form and which is provided adjacent to its outer end with a circumferentially disposed shoulder 14.

Detachably seated in the outer end of head 13 is one end of a rod 15, and fixed in any suitable manner-on the outer end of this rod is a short cylindrical head 16. Formed in the inner face of head 16 to one side of the opening therethrough that receives rod 15 is a substantially V-sha'ped notch 17, one of the faces of which is provided with teeth or corrugations 18.

Arranged on rod 15 immediately adjacent'the head 16 is a short cylindrical head member 19 that is provided on one end with a circumferentiallydisposed shoulder '20, i

and on theopposite end with an outwardly projecting V-shaped lug 21 that is adapted to enter notch 17 in head'16., 'Head member 19 is connected to member 16 by means of longitudinally disposed bolts or screws 22. One of these screws is located'on the opposite side of the axis of the'head from the notch 17 and arranged in a pocket 23 in head member 19 below the head of this screw is a relatively stifi' compression spring 24 that normally exerts outward pressure against the head of said screw thereby causing the latter to function as'a balance screw when the end of a section of wire or the like 7 winding: die, the same comprising short tubular member 30 having formed in its wall a spirally disposed slot 31 and whiclrlatter is formedso that it "makes at least one 'complete turn in the length of the tubular die.

This dieis firmly secured Within the holding lomember 27 by means of set-screwssuch as 32. The die-carrying base plate'25 is moved 1 lengthwise on; bed; plate by a suitable vlnfeeding mechanism under control of a crank or hand wheel such as 33. v

l5 In practicing my improved methodivith the :apparatuslherein shown and described,

,f'theijremovable head comprising members 16 and 19 is removed from the end ofshait eandtube T that is to receive the spirally. diszqiposed ;wire is positioned lengthwise over .f shaft-slfi with one end of said tube bearing tionedon the outer end of rod 15 and after the outer end of the tube is engaged against 1 t shoulder 20 and one end of. the Wire l/V is positioned between lug 21 and the toothed faceof notch 17,- the parts of this head are vsecurely fastenedto each other by tightening the bolts 22 and by setting the screws or nuts that look member 16jto the rod.

7 The dieeholding base plate 25,115 not; moved toward the tube and Wire carryingparts and when headmember 16 has entered the die 3O, the end of wire WV adjacent to the head comprising the parts 16 and 19-Willen-1 a ter the inner end of the spirally disposed ,fslotBO-in die 31. Rotary motion is now im =Iparted ,t o spindle 12 with the result that ic-head13,shatt15,outer head comprising the parts 16 and i19,an,d the supported tube T xwill be rotated and the engagement ofthe --:,wire in-the spirallyvdisposed slot 31 ofthe =11 ,die will cause thelatter to travel lengthwise 5, of thetube T toward the inner head'13 and V as a result, the wire will be spirally dis- .posfed upon the surface of said tube. v

, g After the diehas moved torthe inner end of the tube, that portion of the wire on the,

tube that projects through-the die may be --securedj to said tube by the application of 1lS01dr Or by spot Welding, afterwhich the Outer head member comprisingthelparts 16 F and 19 is removed from the y shaft 15 and therebyenabling thetube with wire spirally disposed thereupon and secured thereto to be removedfrom the supporting, shaft 15 and the die. v a 7 1 Thus it will be seen-that I have provided relatively simple and easily'operated means and an easily practiced method for spirally winding wire, orwire-like strips of metal I on thesurfaces of tubes, cylinderspand the It will be understood that the structure of .1 Pe s through] said j'die.

q 4 In an'apparatus for spirally windi receiving slotQJ] the apparatus herein shown and described may be modified in certain details without departing from the spirit of my invention, thejseope 0t which isset forth in: the appended claims.

' I claim as my invention:

11- The hereindescribed method of spiraland bendsisaid wire as the same and the tube 'ly winding wire upon tubes, which consists simultaneously rotate said tube and wireand applying pressure to said wire so as to cause upon the surface of said tube. 1 i

3 The herein described method of spiral- ,the-sametorbe bent in spiral arrangement. n agaln'st shoulder 14 of head13. Head mem-- L ber comprising, parts 16 and 19 isnow posi- ,lyjwinding wire upon tubes, which consists in mounting a' tube andjwire on a rotatable support,then rotating said support so-as to sunultaneously rotate said tube and wire and applying pressure progressively length- ,wise otsaidwire so as to cause the same to wind spirally upon the surface of said wireupon tubes, means for supporting an simultaneously rotatinga tube and wire and means movable toward ,said supportin means; and through which saldv tube' an wire are adapted to pass for winding the wire spirally upon the surface of said tube. 5. In an apparatus for spirally windin wire upon tubes, means for supporting and simultaneously rotating a tube and wire, a die movabletoward -and away from said supporting ,inieans and through which die the tubeand wire are adapted to pass and which die is provide'd'with a spirally disposed wire- 6. an apparatus for spirally winding wire upon tubes, a rotary supportingr'memwith a. spirally disposed slot that receives in mounting atube and wire ona rotatable 7 @support, then rotating said support'so as '00 ber, mean s on said member-for clamping a tube and wire,.a die mounted to move length- ,wise of said supportingmember and which die is provided with, a Wire-receiving slot that is arranged so that the Wirein passing therethrough is spirally disposed upon the surface of the tube.

d. In an apparatus for spirally winding :wirepupon. tubes, the combination with a tubular die having an internally arranged wire-rece v ng sl0t,of a combined tube and wire-supporting spindle adapted jto pass througlrsaid";die.- r I 8 Iniau, apparatus for spirally winding wire upon" tubes, a spindle comprising a shaft, apai'r ofheads carried by said shaft,

which heads are adaptedtof'engage and suprt a tube, and means on one of said heads of wire are adapted to ass and which die or clamping a. section' of wire. is provided with a spiral y disposed slot that 9. In an apparatus for spirally winding receives the wire as said die is moved longi- 10 wire upon tubes, a spindle, means carried by tudinally relative to the tube and its sup- 5 said spindle for supporting and clamping a port. 7

tube and a section of wire, a non-rotating die In testimony whereof I affix my signature. through which the spindle, tube andsection LEWIS F. DAVIS. 

